#include "stdio.h"

int main(){
    int max();
    extern int A,B,C;
    scanf("%d %d %d",&A,&B,&C);
    printf("max is %d\n",max());
    return 0;
}

int A,B,C;

int max(){
    int m;
    m=A>B?A:B;
    if(C>m) m=C;
    return m;
}